%0 Journal Article %A Adam Keilthy %A Martin Raum %T Formal deformations of modular forms and multiple L-values %J Journal de l’École polytechnique — Mathématiques %D 2026 %P 853-890 %V 13 %I École polytechnique %U https://jep.centre-mersenne.org/articles/10.5802/jep.338/ %R 10.5802/jep.338 %G en %F JEP_2026__13__853_0